GB2202922A - Movable-member supporting apparatus - Google Patents
Movable-member supporting apparatus Download PDFInfo
- Publication number
- GB2202922A GB2202922A GB08802666A GB8802666A GB2202922A GB 2202922 A GB2202922 A GB 2202922A GB 08802666 A GB08802666 A GB 08802666A GB 8802666 A GB8802666 A GB 8802666A GB 2202922 A GB2202922 A GB 2202922A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flexible
- movable
- supporting apparatus
- suppressing
- portions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0932—Details of sprung supports
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
Description
MOVABLE-MEMBER SUPPORTING APPARATUS
DESCRIPTION
The Present invention relates to a movable-member supporting apparatus which is suitable to support a movable member such as an optical pickup. In the movable-member supporting apparatus according to the present invention, a flexible portion which is bent in response to a motion of the movable-member is provided in the vicinity of a fixed end portion.
Fig. 1 is a perspective view showing an optical pickup. In the drawing, an objective lens 1 is fixed to a cylindrical member 2 to converge light and irradiate a disk (not shown) with the converged light. The cylindrical member 2 is fixed to a bobbin 3. Focusing and tracking coils 4 and 5, respectively, are attached to an outer circumference of the bobbin 3. Those parts described above constitute a movable member. The movable member is provided with a supporting portion 6 which is supported by a supporting member (or suspension) 7 and connected to a fixed member 8 through the supporting member 7.
When a focusing or a tracking error signal is supplied to the coil 4 or 5, respectively, the coil 4 or 5, which is disposed in a magnetic field of a magnet (not shown), receives an electromagnetic force, so that the movable member moves in the focusing direction (Fig. 2(b)) or in the tracking direction (Fig. 2(a)), respectively. As a result, the focusing/tracking state of light impinging onto the disk through the objective lens 1 is controlled.
Fig. 4 shows the -.structure. of the above-mentioned supporting member 7. In the drawing, a wire 11 is surrounded by a rubber material 12. Being flexible, the wire 11 can make the movable member move in the focusing/tracking direction. The rubber material 12 is provided to suppress unnecessary vibrations of the wire 11.
In the thus it is difficult to prevent (absorb) resonance of the supporting member in the axial (longitudinal) direction. As shown in Fig. 3, when resonance is generated in the supporting member 7 in the longitudinal direction (the direction A in Fig. 3) thereof, the movable member (which constituted supporting member, however, 1 includes the bobbin 3 and the objective lens 1 sjr)r)c>r.'%--ed by the bobbin 3) is rotated in the direction B in Fig. 3 within a plane parallel to the sheet of the drawing.
Fia. 5 shows the strucL.ure of a supporting member arranged so as to absorb the above-mentioned resonance in the longitudinal direction. The supporting member 7 has end portions 21 fixedly attached to a movable member and a fixed member, respectively, the end portions 21 being connected to each other through a connecting portion 22.
The connecting portion 22 is formed of a pair of corrugated portions 23 and 24 formed in a corrugated shape and a pair of linear portions 25 and 26 formed in a substantially linear shape and disposed at a center between the corrugated portions 23 and 24. Each of the corrugated portions 23 and 24 connects the pair of end portions 21 to each other. The linear portions 25 and 26 are connected at their one ends to the respective end portions 21 and extended from the latter, the other ends of the linear portions 25 and 26 overlapping each other at a substantially central portion between the end portions 21. The overlapped portion of the linear portions 25 and 26 are not connected with each other but are separated from each other.
The connecting portion 22 is bent in the direction substantially perpendicular to the sheet plane when the connecting portion 22 moves in the focusing direction, and bent in the direction substantially parallel to the sheet plane when the connecting portion 22 moves in the trackina direction, as viewed in Figure 5.
is On the other hand, for example, if the connecting portion 22 moves by /\ X in its longitudinal direction as shown in Fig. 7, the overlapped portions of the respective linear portions 25 and 26 are elongated (or shortened) correspondingly and the corrugated portions 23 and 24 are elastically transformed. A vibration- suppressing member 27 is attached at a position (a substantially longitudinal center of the connecting portion 22) where the linear portions 25 and 26 are overlapped on each other. As shown in Fig. 6, the vibration-suppressing member 27 is constituted by an absorbing member 31 made of a viscoelastic member (it suffices to apply only a viscoelastic agent), rubber, or the like, and a supporting member 32 made of aluminum foil, or the like, for supporting the absorbing member 31. Since the absorbing member 31 absorbs motion of the linear portions 25 and 26, the resonance in the longitudinal direction is prevented from being generated.
In the conventional movable-member supporting apparatus as shown in Fig. 5, resonance in the lonaitudinal direction can be Drevented from occurring as described above, however, there is less vibration- suppressing effect against the displacenient in the essential focusing/tracking direction. Accordingly, there is such a disadvantage that the Q factor (peak quantity) at a low-band resonant frequency becomes large to about 30 dB as shown in Fig. 8.
An object of the present invention is to provide a movable-member supporting apparatus in which not only the resonance in the longitudinal direction can be suppressed but the Q factor at a low-band resonant frequency can be made small.
In order to attain the above object, the movable-member supporting apparatus according to the present invention comprises a first end portion fixed to a movable member, a second end portion fixed to a fixed member, a connection portion for connecting the first and second end portions with each other, a flexible portion provided at a portion of the connection portion in the vicinity of one of the first and second end portions and arranged so as to be flexible in the loncitudinal direction of the connecting portion and at least. in one direction substantially perpendicular to the longitudinal direction, and a vibration-suppressing m e,-,,b e r for suppressing vibrations of the flexible member.
The first and second end-portion are fixed to the movable and fixed member, respectively, and are connected through the connecting portion. The flexible portion is provided on the connecting portion in the vicinity of the first or second end portion. The flexible portion is arranged so as to be flexible in the longitudinal direction of the connecting portion and at least in the direction substantially perpendicular to the former.
is In the acco-,,ipan-inc- dra,,,.,ings:
Fig. 1 is a perspective view showing a movable-member supporting member; Figs. 2 and 3 are views for explaining the displacement of the supporting member of Fig. I; Fig. 4 is a vie,,,,,, showing the arrangement of supporting member of Fig. 1; Figs. 5 through 7 are views showing the arrangement of another example of the supporting member of Fig. 1; conventional Fig. 8 is a diagram showing the characteristics of the supporting member shown in Figs. 5 through 7.
Fig. 9 is a perspective vi e.,,; showina the movable-mem.ber supporting apparatus according to the present, invention; Figs. 10 and 11 are views showing the arrangement of the supporting member of the movable-member supporting apparatus; Fig. 12 is an explanatory view showing the 10 displacement of the supporting member; Fig. 13 is a diagram showing the characteristics of the supporting member; and Fig. 14 is a view showing the arrangement of another embodiment of the supporting member; Fig. 9 is a perspective view showing a movable-member supporting apparatus according to the present invention, applied to an optical pickup apparatus. In the drawing, parts corresponding to those in Figs. 1 through 7 are correspondingly referenced and the detailed description about them is omitted.
-a- As shown in Figs. 9 and 10, the supporting member 7, according to the present invention, comprises a pair of end portions 41 fixedly attached to a movable member and a fixed mem-ber, respectively, a linear connecting portion 43 for connecting the pair of end portions 41 with each other, and flexible portions 42 formed on the connecting portion 43 in the vicinity of the pair of end portions 41. The above described parts of the supporting member are formed integrally with each other by any suitable method, for example, by etching metal such as copper, stainless steel, or the like. Vibration-suppressing members 27 are attached to the flexible portions 42 (in the state illustrated in Fig. 10 only one vibrationsuppressing portion is shown for convenience sake). The structure of each of the vibration- suppressing members is the same as that described in the above case.
Each of the flexible members 42 is provided with a substantially annular portion 44, a substantially U-shaped portion 46 disposed at a substantially center portion of the annular portion 44, and a linear portion 45 linearly disposed inside the U-shape portion 46. The linear portion 45 and the U-shape portion 46 are separated from each other.
-A -C- Assuming now that the supporting member 7 is displaced in its longitudinal direction, the state of the supporting member 7 changes from that shown in Fig. 11(a) into that shown in Fig. 11(b). That is, the annular Dortion 44 is elastically transformed into an elliptical shape, so that the linear portion 45 is displaced by a distance /\ X. At the time, the U- shaped portion 46 is not displaced.
On the other hand, when the movable-member is moved in a tracking direction, the supporting member 7 is rotated within a plane substantially parallel to the surface of the sheet of the drawing, as shown in Fig. 11(c). Accordingly, the annular portion 44 is elongated at one side while contracted at the other side, so that the linear portion 45 is slanted inside the U-shaped portion 46.
Upon occurrence of a motion in the focusing direction, on the other hand, the state of the supporting member 7 is as shown in Fig. ll(d). That is, the plane of the linear portion 45 becomes askew to the plane of the U-shaped portion 46, so that the linear portion 45 projects form the latter plane.
As described above, upon occurrence of a motion in any one of the three directions, displacement is caused correspondingly in the flexible merntber 42. Since the vibration-suppressing member 27 is attached to the flexible portion 42, the vibration in any direction can be suppressed.
The stress distribution when the supporting member 7 is displaced as shown in Fig. 12(a) becomes as shown in Fig. 12(b). The stress is maximum at the end portion of the supporting member attached to the movable merrLber or the fixed member. As described above, since the flexible of the end portion, becomes maximum at of 27 42 vibration suppressing effect. As'a result, as shown in Fig. 13, is possible to make the Q factor (peak quantity) at lowband resonance frequency f a small, approximately dB.
Fig.14 portion 42 is provided in the vicinity the displacement caused in each motion the "flexible portion. Accordingly, the (1;antity transformation of the vibration-suppressing member owing to the displacement of the becomes maximum, resulting in maximum flexible portion it a 17 illustrates another embodiment of the supporting member 7 (vibration- suppressing member is not shown). In this embodiment, the flexible portion 42 is provided with a substantially semicircular curved portion 44, a linear portion 45 linearly projecting from a side portion of an end portion 41. In this arrangement, it is 11 i 5k --, 1 - 1 possible to obtain the same effect as that in the first embodiment.
As described above, the movable-member supporting apparatus according to the present invention, comprises a first end portion fixed to a movable member, a second end portion fixed to a fixed member, a connection portion for connecting the first and second end portions with each other, a flexible portion provided at a portion of the connection portion in the vicinity of one of the first and second end portions and arranged so as to be flexible in the longitudinal direction of the connecting portion and at- least n one direction substantially perpendicular to the longitudinal direction, and a vibration-suppressing member for suppressing vibrations of the flexible member.
Accordingly, resonance in the longitudinal direction can be suppressed and the Q factor at a low-band resonance frequency in a normal motion can be made small.
Claims (5)
1. A movable-member supporting apparatus comprising: a first end portion fixed to a movable member; a second end portion fixed to a fixed member; a connecting portion for connecting said first and second end portions to each other; a first flexible portion provided at a portion of said connecting portion in the vicinity of one of said first and second end portions and arranged so as to be flexible in the longitudinal direction of said connecting portion and at least in one direction substanti.ally perpendicular to said longitudinal and a first direction;. vibration-suppressing member attached to said first flexible portion for suppressing vibrations of said flexible member.
2. The movable-member supporting apparatus according to claim 1, further comprising a second flexible portion provided at a portion of said connecting portion in the vicinity of another of said first and second end portions and arranged so as to be flexible in the longitudinal direction of said connecting portion and at least in one direction substantially perpendicular to said longitudinal direction.
A
3. The movable-member supporting apparatus according to claim 2, further comprising a second vibration- suppressing member attached to said second flexible portion for suppressing vibration of said second flexible member.
4. The movable-member supporting apparatus according to claim 1, wherein said first flexible portion comprises: a substantially annular portion, a substantially U-shaped portion disposed at a center portion of said annular portion and connected to one side thereof, and a linear portion linearly disposed inside and to anbther side of said annular portion.
The movable-member supporting apparatus to claim 1, wherein said first flexible portion a substantially semicircular curved portion at one end t6 one of said first and second end a linear portion linearly projecting from a of said one of said first and second end connected.
5.
accotdina comprises connected portions, and side portion portions.
Published 1988 at The Patent Cmee, State House, 66171 High Holborn, London WC1R 4TP. Further copies maybe obtained from The Patent OffIce, Sales Branch, St Mary Cray, Orpington, Kent BRS 3RD. Printed by Multiplex techniques ltd, St Mary Cray, Kent. Con. 1187.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62028748A JPS63195834A (en) | 1987-02-10 | 1987-02-10 | Supporting device for movable body |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8802666D0 GB8802666D0 (en) | 1988-03-02 |
| GB2202922A true GB2202922A (en) | 1988-10-05 |
| GB2202922B GB2202922B (en) | 1991-04-17 |
Family
ID=12257029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8802666A Expired - Lifetime GB2202922B (en) | 1987-02-10 | 1988-02-05 | Optical pickup assembly |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4927235A (en) |
| JP (1) | JPS63195834A (en) |
| DE (1) | DE3804075A1 (en) |
| GB (1) | GB2202922B (en) |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5140471A (en) * | 1989-02-10 | 1992-08-18 | Kabushiki Kaisha Toshiba | Apparatus for driving objective lens |
| JP2798719B2 (en) * | 1989-08-15 | 1998-09-17 | オリンパス光学工業株式会社 | Optical system support device |
| US5115120A (en) * | 1990-06-26 | 1992-05-19 | Photographic Sciences Corporation | Scan modules for bar code readers and in which scan elements are flexurally supported |
| US5241424A (en) * | 1990-07-12 | 1993-08-31 | Konica Corporation | Fine actuator |
| JP2761972B2 (en) * | 1990-08-21 | 1998-06-04 | 株式会社日立製作所 | Objective lens driving device and optical disk device |
| JPH0752511B2 (en) * | 1991-01-22 | 1995-06-05 | 富士ゼロックス株式会社 | Optical information recording / reproducing device |
| JP2978588B2 (en) * | 1991-05-27 | 1999-11-15 | パイオニア株式会社 | Method for manufacturing lens driving device in optical pickup |
| DE69219856T2 (en) * | 1991-11-07 | 1997-12-18 | Philips Electronics Nv | Electro-optical scanner, joint element for use in the scanner and optical turntable with the scanner |
| KR950004797B1 (en) * | 1991-12-31 | 1995-05-10 | 삼성전자주식회사 | Optical pick up apparatus for cdp |
| JP2981351B2 (en) * | 1992-10-22 | 1999-11-22 | シャープ株式会社 | Objective lens drive |
| US5485437A (en) * | 1993-02-05 | 1996-01-16 | Discovision Associates | Shock-resistant, electrostatically actuated pick-up for optical recording and playback |
| JP3006813B2 (en) * | 1993-06-07 | 2000-02-07 | 日本電気株式会社 | Objective lens actuator for optical head |
| US5428589A (en) * | 1993-08-17 | 1995-06-27 | Eastman Kodak Company | Apparatus and method for an electromagnetic actuator with two orthogonal axes of motion |
| US5715231A (en) * | 1993-09-14 | 1998-02-03 | Kabushiki Kaisha Toshiba | Objective lens driving apparatus and optical head driving apparatus |
| JP3279024B2 (en) * | 1993-10-30 | 2002-04-30 | ソニー株式会社 | Optical pickup device |
| JP3246140B2 (en) * | 1993-11-16 | 2002-01-15 | ソニー株式会社 | Objective lens drive |
| JP3319481B2 (en) * | 1993-12-22 | 2002-09-03 | ソニー株式会社 | Objective lens driving device and optical disk device using the same |
| JP2833464B2 (en) * | 1994-02-14 | 1998-12-09 | 日本電気株式会社 | Objective lens actuator and method of manufacturing the same |
| JP3480129B2 (en) * | 1995-06-28 | 2003-12-15 | ソニー株式会社 | Two-axis actuator and optical pickup |
| JP3894509B2 (en) * | 1995-08-07 | 2007-03-22 | キヤノン株式会社 | Optical apparatus, exposure apparatus, and device manufacturing method |
| KR970029416A (en) * | 1995-11-30 | 1997-06-26 | 김광호 | Objective lens driving device for optical pickup |
| US5724197A (en) * | 1996-08-14 | 1998-03-03 | Eastman Kodak Company | Actuator which compensates for compact disk tilt error |
| JPH11191231A (en) * | 1997-12-26 | 1999-07-13 | Nhk Spring Co Ltd | Objective lens actuator |
| WO1999054873A1 (en) * | 1998-04-17 | 1999-10-28 | Koninklijke Philips Electronics N.V. | Optical scanning device comprising a main lens and an auxiliary lens |
| DE19951862A1 (en) * | 1999-10-27 | 2001-05-03 | Thomson Brandt Gmbh | Optical scanner |
| US6813225B2 (en) | 2001-08-20 | 2004-11-02 | Asm Assembly Automation Limited | Linear motor driven mechanism using flexure bearings for opto-mechanical devices |
| US20040268373A1 (en) * | 2003-01-29 | 2004-12-30 | Samsung Electronics Co., Ltd. | Tilt drive optical pickup actuator and optical recording and/or reproducing apparatus using the same and method |
| JP4712480B2 (en) * | 2005-08-10 | 2011-06-29 | オリンパスイメージング株式会社 | Lens drive device |
| JP2007311010A (en) * | 2006-04-21 | 2007-11-29 | Sony Corp | Optical pickup and optical disc apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB497051A (en) * | 1937-08-06 | 1938-12-12 | Edward Turner | A resilient device, for use in a vehicle suspension system or elsewhere |
| EP0093669A1 (en) * | 1982-04-29 | 1983-11-09 | SOCIETE M T E Société anonyme | Spring with damping means |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3379205A (en) * | 1964-10-12 | 1968-04-23 | Honeywell Inc | Pneumatic force balance controller |
| FR1590628A (en) * | 1968-06-19 | 1970-04-20 | ||
| US4592037A (en) * | 1980-11-28 | 1986-05-27 | Hitachi, Ltd. | Device for displacing a pickup head in multi-axial directions |
| JPS5864649A (en) * | 1981-10-13 | 1983-04-18 | Matsushita Electric Ind Co Ltd | Driving device for objective lens |
| DE3302918A1 (en) * | 1982-01-28 | 1983-08-04 | Ricoh Co., Ltd., Tokyo | OPTICAL RECORDING AND / OR READING DEVICE |
| JPS59104733A (en) * | 1982-12-08 | 1984-06-16 | Pioneer Electronic Corp | Optical system driver of optical information reader |
| US4720088A (en) * | 1983-05-18 | 1988-01-19 | Canon Kabushiki Kaisha | Optical system supporting device |
| JPS60155022U (en) * | 1984-03-21 | 1985-10-16 | パイオニア株式会社 | Optical system drive device in optical information reading device |
| NL8403052A (en) * | 1984-10-08 | 1986-05-01 | Philips Nv | OPTICAL DEVICE. |
| US4794580A (en) * | 1985-07-12 | 1988-12-27 | Pioneer Electronic Corporation | Pickup system in optical information recording and reproducing apparatus with damped lead wires |
| JPS6242121U (en) * | 1985-08-30 | 1987-03-13 | ||
| US4750164A (en) * | 1985-12-09 | 1988-06-07 | Canon Kabushiki Kaisha | Optical system driving device |
-
1987
- 1987-02-10 JP JP62028748A patent/JPS63195834A/en active Granted
-
1988
- 1988-02-05 GB GB8802666A patent/GB2202922B/en not_active Expired - Lifetime
- 1988-02-10 DE DE3804075A patent/DE3804075A1/en active Granted
-
1989
- 1989-09-26 US US07/412,615 patent/US4927235A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB497051A (en) * | 1937-08-06 | 1938-12-12 | Edward Turner | A resilient device, for use in a vehicle suspension system or elsewhere |
| EP0093669A1 (en) * | 1982-04-29 | 1983-11-09 | SOCIETE M T E Société anonyme | Spring with damping means |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8802666D0 (en) | 1988-03-02 |
| DE3804075A1 (en) | 1988-09-08 |
| GB2202922B (en) | 1991-04-17 |
| DE3804075C2 (en) | 1990-06-28 |
| US4927235A (en) | 1990-05-22 |
| JPH0542061B2 (en) | 1993-06-25 |
| JPS63195834A (en) | 1988-08-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB2202922A (en) | Movable-member supporting apparatus | |
| KR970001975B1 (en) | Objective lens driving apparatus | |
| US20020071358A1 (en) | Four-axial driving actuator for optical pickup | |
| KR950020476A (en) | Objective lens drive and coil bobbin | |
| MY123668A (en) | Objective lens driving device | |
| JPH06274910A (en) | Two-axis actuator | |
| JPH0349137B2 (en) | ||
| JP3199336B2 (en) | Support structure for speaker vibration system | |
| KR970017502A (en) | Optical pickup actuator for compact disc player | |
| JP3315950B2 (en) | Objective lens actuator | |
| CN215953943U (en) | Lens driving device, image pickup device, and mobile terminal | |
| KR900000029Y1 (en) | Tracking apparatus for compact disc player | |
| JPS6020325A (en) | Supporting device of optical system | |
| CN1319058C (en) | Objective lens actuator with improved resonance frequency | |
| JPH03100934A (en) | Objective lens driving device | |
| JPH05346130A (en) | Vibration absorbing spring | |
| KR100269189B1 (en) | Actuator for Positioning Mechanism | |
| JPH08321057A (en) | Optical pickup device | |
| KR0131563Y1 (en) | Optical pick-up assembly | |
| JP3470745B2 (en) | Optical head actuator | |
| JPH05101404A (en) | Objective lens driving device | |
| JPH03125337A (en) | Optical supporter | |
| JPS6316433A (en) | Supporting device for objective lens | |
| JPH08329503A (en) | Optical pickup device | |
| JPH0916993A (en) | Optical pickup device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 746 | Register noted 'licences of right' (sect. 46/1977) |
Effective date: 19940325 |
|
| PE20 | Patent expired after termination of 20 years |
Effective date: 20080204 |